Sunday, June 5, 2011

Audio level meter

Audio level meter makes use of IC as well as a only a few number of outside parts. It displays the audio level in terms of ten LEDs. The input voltage can vary from 12V to 20V, but suggested voltage is 12V.

The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives0 LEDs providing a logarithmic seven dB/step analog display.(Audio level meter) LED current drive is regulated and programmable, eliminating the necessity for current limiting resistors.

The IC contains an adjustable voltage reference and an correct ten-step voltage Audio level meter The high-impedance input buffer accepts signals down to ground and up to within one.5V of the positive supply. Further, it needs no protection against inputs of ±35V. The input buffer drives ten individual comparators referenced to the precision divider.Audio level meter Accuracy is usually better than one dB.Audio level meter also.

 Audio level circuit meter is simple as it show.

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